381068639 has 12 divisors (see below), whose sum is σ = 446481000. Its totient is φ = 324274608.

The previous prime is 381068629. The next prime is 381068641. The reversal of 381068639 is 936860183.

It is not a de Polignac number, because 381068639 - 2⁸ = 381068383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381068639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381068609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21164 + ... + 34785.

It is an arithmetic number, because the mean of its divisors is an integer number (37206750).

Almost surely, 2^381068639 is an apocalyptic number.

381068639 is a deficient number, since it is larger than the sum of its proper divisors (65412361).

381068639 is a wasteful number, since it uses less digits than its factorization.

381068639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56102 (or 56095 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 381068639 is about 19520.9794580088. The cubic root of 381068639 is about 724.9939842545.

The spelling of 381068639 in words is "three hundred eighty-one million, sixty-eight thousand, six hundred thirty-nine".